[bh_trade]

Actual volume is usually *very* close to the volume bar setting, i.e. very close to constant volume, within a handful of shares on my charts. I was unable to enlarge your chart so I could not see the actual numbers but I suspect the reason the volume subgraph "looks" so spikey is due to scaling, meaning a 510 share bar might look like a huge spike on the subgraph when in reality it is less than 2% difference from ideal.